The proof for this functional equation feels like magic
15:29
The hardest functional equation in the history of USA Team Selection Tests.
19:07
Why is the determinant like that?
14:15
Functional Equation
18:39
Can you crack this beautiful equation? – University exam question
10:44
A probabilistic approach to a very hard number theory problem
22:22
10,000 Problems in Analysis
11:59
Pierre de Fermat couldn't find this solution
18:15